Cr(VI)
Hexavalent chromium
CrO 4
2À
Chromium oxoanion
Cr 2 O 7
2À
Dichromate ion
Cs(I)
Caesium(I) ion
DALYs
Disability-Adjusted Life Years
E
Mean free energy in (kJ/mol) unit
Fe
Iron
Fe(III)
Element iron in its +3 oxidation state
FeCl 3
Iron(III) chloride
FeCl 3 .6H 2 O Iron(III) chloride hexahydrate
Fe-MBC
Iron-magnetic biochar
H
+
A cationic form of atomic hydrogen
Hg
Mercury
Hg(II)
Mercury(II) cation
HCrO 4
À
Hydrogen chromate ion
k 1
Rate constant in min
À1 unit
k 2
Rate constant in g/mgÁmin unit
K F
Freundlich isotherm constant in (mg
1–1/n L
1/n g
À1 ) unit
K L
Langmuir isotherm constant in L/mg unit
K DR
Dubinin-Radushkevich isotherm constant in (mol
2 /kJ
2 ) unit
MnFe 2 O 4
Manganese ferrite
MnSO 4 .H 2 O Manganese sulphate monohydrate
n
Adsorption intensity
1/n
Linearity degree of the relationship between the solution
concentration and adsorption capacity
Ni
Nickel
Ni(II)
Nickel (II) ion
NiCl 2
Nickel(II) chloride
OH
À
Hydroxide, a diatomic anion
Pb
Lead
Pb(II)
Lead(II) ion
q e , Q e
Equilibrium adsorption capacity in mg/g unit
Q m
Maximum adsorption capacity in mg/g unit
q t
Adsorption capacity at time t in mg/g unit
R
Universal gas constant (8.314 J/molÁK)
Se(IV)
Selenium(IV) ion
t
Time in min unit
T
Temperature in K unit
U(VI)
Uranyl ion
V(V)
Vanadium(V) ion
WHO
World Health Organization
Zn
Zinc
Zn(II)
Zinc ion
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